How to Identify a Faulty Thermostat?

1 Answers
FernandoLee
07/29/25 12:09pm
Methods to identify a faulty thermostat include: 1. On-vehicle inspection method - You can determine the condition of the thermostat without removing it from the engine by checking the temperature difference between the upper and lower radiator hoses; 2. Removal inspection - After taking the thermostat off the engine, measure its opening temperature using a boiling water test. A car thermostat is a valve that controls the flow path of engine coolant. This product automatically adjusts the amount of water entering the radiator based on coolant temperature to ensure the engine operates within an appropriate temperature range, which helps save energy consumption.
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